Attachment for spark-plugs



A. R. PRICE.

ATTACHMENT FOR SPARK PLUGS.

APPLICATION FILED APR. 10. 1920.

1 ,397,0 1 7 Patented Nov. 15, 19211 [27. Vania? Q. WWW

STATES ABNER RANDOLPH PRICE, OF TORONTO, ONTARIO, CANADA.

. ATTACHMENT BOB SPARK-PLUGS.

Application filed April 10,

To all whom it may concern:

.Be it known that 1, Annex RANDOLPH Pinon, a subject of the King of Great Britain, and resident of 65 Hepbourne St, in the city of Toronto, in the county of York, in the Province of Untario in the Dominion of Canada, have invented certain new and useful Improvements in Attachments for Spark- Plugs, of which the following is a specification. 1

The invention relates to improvements in attachments for spark plugs as described in the present specification and shown in the accompanying drawings that form a part of the same.

The invention consists essentially of the novel construction and arrangement of parts whereby air is introduced to the interior of the spark plug through a casing having a hollow extension therefrom threading through the wall of said plug, said casing being provided with suitable valve mechanism adapted to be controlled by the operation of the piston.

The objects oi the invention are to introduce air to the plug at the time of ignition and thus eliminate the accumulation of carbon, to provide a form of attachment which may be readily secured to any of the makes of spark plugs to add to the general efficiency of the engine and generally to provide an attachment for the purpose described which will be inexpensive to construct, simple to install, durable and efticient.

In the drawings Figure 1 is a side elevation of a spark plug of conventional design having the attachment which constitutes the present invention incorporated therewith.

Fig. 2 is a vertical sectional view through the attachment, the regulating screw or plug being shown in full.

Fig. 3 is a bottom View of the attachment.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings 1 is a spark )lug which may be of any desired make or design and which may be provided with a threaded opening through one wall forming a means of communication with the interior thereof.

2 represents the body of the attachment which is preferably formed of a substantially rectangular solid body having suitable air passages drilled therethrough, as will be described hereinafter, and being pro- Specification of Letters Patent.

Patented Nov. in, 1921.

1920. Serial No. 372,892.

vided adjacent one end thereof with a threaded extension'or nipple l adapted to engage the opening in the wall of the spark plug. a

The body 2 is provided with a longitudinal bore opening from the end opposite to that on which the nipple 4 is located, said bore for a considerable portion of its length being comparatively large and threaded as at 5, and beyond said threaded portion for a short distance being of smooth bore as at 6 from which point it reduces abruptly forming a valve seat 7 and then continues inwardly in a comparatively long and narrow valve orifice 8 terminating short of the end of the body or casing.

9 is a bore of comparatively small dimensions leading outwardly from the smooth portion 6 of the longitudinal bore a short distance and then turning at right angles as at 10 and extending longitudinally of the body 2 and leading outwardly through the nipple 4 in a right angle portion 11.

12 is the air inlet passage extending through the wall directly opposite to that in which the bore 9 is located, said passage being disposed slightly below the valve seat 7. I

13 is the valve stem adapted to operate in the reduced portion 8 of the longitudinal bore and being slightly shorter than said reduced portion and being provided with a head 14- adapted normally to rest on the seat 7, in which position the inner end of the bore 9 and the portion 6 of the longitudinal bore will be in open communication.

The valve stem 13 is provided with an an nular groove 15 so positioned that when the valve is in its closed positions, said groove 15 and the air inlet 12 will be in overlapping arrangement, so that air entering through said inlet will strike the upper wall of said groove and force the valve upwardly.

16 is a plug threading into the enlarged mouth of the longitudinal bore and terminating substantially even with the corresponding wall of the bore 9 said plug being for the purpose of forming a means to regu late the longitudinal movement of the valve 13.

When the attachment has been secured in its proper position in relation to the spark plug by simply screwing the nipple 4: into the opening which has previously been formed in the wall of said plug'the operation is as follows :Upon each intake stroke of the piston a certain amount of suction is provided within the spark plug and consequently within the casing 2 and this suction in combination with the pressure of the outside atmosphere against the valve stem 13 raises the head 14 from the seat 7 and per,- mits air to flow upwardly into the outlet 9 and into the spark plug. Upon completion of the intake stroke the valve falls by force of gravity to its seat, in which position it will be seen it will be held during the compression stroke of the piston to be again released upon the succeeding suction or intake stroke. The limit of movement of the valve may be controlled by means of the plug 16 according to the amount of air it is desirable to admit. to the spark plug.

It will thus be seen that by means of this attachment air is admitted to the spark plug prior to each explosion, thus serving to cool same and eliminate corrosion of the insulating members.

What I claim is:

1. In a spark plug attachment, an air valvecasing having an inlet passage and an outlet passage in the wall thereof leading to and from the central valve chamber, and a valve operating in said chamber and being provided with an intermediate annular groove registering with said air inlet passage.

2. In a spark plug attachment, an air valve casing having an inlet passage and an outlet passage in the wall thereof leading to and from the central valve chamber, a valve operating in said chamber and grooved annularly opposite said inlet and an extension from the wall of said casing threading into the spark plug.

3. In a spark plug attachment, a valve casing having an inlet passage leading into the valve chamber intermediate of the height thereof and an outlet passage leading from said chamber at the upper end and extending through the wall to and through a threaded. extension fastened to the spark plug, a valve seat formed in said chamber between said inlet and said outlet, a valve operating in said chamber and being provided with a head adapted in the closed position toengage said seat, said valve being grooved annularly below said head overlapping the top portion of said inlet, and an adjustable closure for the vacuum chamber beyond the head of said valve in its closed position.

Signed at the city of Toronto, this seventh day of April 1920.

ABNER RANDOLPH PRICE. l/Vitnesses:

W. G. HAMMOND, G. MURPHY. 

